It keeps restarting...Is it broken?

I let my sister use my treo755p this morning and she tuned the power off and when i turned is back on it reset and now the only thing that comes up is the "The Access Powered screen and the palm screen" then it just turns back and shuts off and does that over and over again and it wont start. i dont know what to do. i took took the battery out for a hour but that didnt help and i dont know nothin else about this phone so can sumone help me...

System Reset or Warm Reset
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On Treo 755p
1 Remove the battery from your smartphone.
2 Press and hold Up while reinserting the battery.
3 When Date & Time Preferences appears, then release Up.
4 Delete the third-party application that you suspect is causing the problem.
5 Perform a soft reset. The wireless features of your smartphone are not available until you complete this step.